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A ray of light is refracted from a fluid into glass(n=1.6). The incident angle is 40 degrees and the refracted angle is 30 degrees. What is the index of refraction of the fluid?
A solid cylinder of mass 10kg and radius 20cm is free to rotate around an axis parallel to the axis of the cylinder. What is the kinetic energy of the cylinder
A 1.2 kg toy car traveling at 2.0 m/s to the right collides and sticks to a 2.0 kg toy car traveling at 1.6 m/s to the left. What fraction of the total initial kinetic energy was lost in the collision
Consider a thin ring of radius a with uniform charge density and total charge Q. The ring is cut in half across the diameter and the two halves superimposed to double the effective charge density. Calculate the electric field at a point 4a from the r..
A 9500 line/cm grating reveals that a beam of light contains three different wavelengths. When the light strikes the grating at normal incidence, What are the wavelengths for each angle
A tube is partially and vertically inserted into a container of water. Two sequential resonant frequencies are heard when a 215-Hz tuning is struck and held atop the end of the tube that is out of the water. What is the temperature of the surroundi..
A 650-N Marine in basic training climbs a 11.5-m vertical rope at a constant speed in 9.50 s. What is his power output
Two charges of equal magnitude exert an attractive force of 3.0×10-4 N on each other. how far apart are the charges
A man is holding an 8.00-kg vacuum cleaner at arm's length, a distance of 0.550 m from his shoulder. What is the torque on the shoulder joint if the arm is horizontal
A disk having mass M and radius R spins about an axis through its center and prependicular to the flat face of the disk at angular velocity. calculate the moment of inertia of the rod about one end
A king orders a gold crown having a mass of 0.68 kg. When it arrives from the metalsmith, the volume of the crown is found to be 145 cm^3
In the lab frame, a point charge of +q is at rest between two streams of positive charge moving at c/3. The charge per unit length in the line of moving charges is ?C/m. In the lab frame, the electrostatic forces on charge q add up to zero, and th..
question1a rocket with mass m is fired vertically upward. at an instant it reaches an altitude of 800m and a speed of
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